The models are:
has_many :categories, :through => :categorizations
has_many :companies, :through => :categorizations
I would create a new company, assign a category and assign a
classification to the company.category all with one form.
Is it possible?
I think the only way is to create a new company and assign a category
with one form, then in the company controller or company model assign
a classification at company.category, the classification.id may be
passed as a parameter with the form.
What do you think about?